Elemental composition, corrosion resistance and mechanical properties of computer-aided design and computer-aided manufacturing fixed retainers versus conventional fixed retainers.
J Oral Sci
; 66(2): 107-110, 2024 Apr 16.
Article
in En
| MEDLINE
| ID: mdl-38403676
ABSTRACT
PURPOSE:
To investigate the elemental composition, corrosion resistance, and mechanical properties of computer-aided design and computer-aided manufacturing (CAD-CAM) retainers versus conventional fixed retainers (FRs).METHODS:
Eight different retainer wires were investigated. Energy dispersive X-ray spectroscopy was used to determine the elemental composition. Leakage was analysed according to ISO 102712020 guidelines. Hardness was tested using the Vickers method with a load of 0.3 kg. The tensile force and tensile strength were evaluated. Multiple comparisons among wires of hardness, tensile force, and strength were conducted using the Welch t-test, with Bonferroni correction.RESULTS:
Nickel was present in all wires. The CAD-CAM-FR wire, which contained more nickel than the other wires, had no measurable leakage. The gold-plated wires had the highest total leakage, but did not exceed the ISO standard limit. The hardness of the stainless-steel twisted wires was the highest and that of the CAD-CAM-FR wire was the lowest. The tensile strength of the CAD-CAM-FR wire was significantly lower than that of the other wires and similar to the other twisted-wire retainers.CONCLUSION:
The CAD-CAM-FR wire is likely to have high corrosion resistance and flexibility due to its low hardness.Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Orthodontic Retainers
/
Nickel
Language:
En
Journal:
J Oral Sci
Journal subject:
ODONTOLOGIA
Year:
2024
Document type:
Article